@article{PismaZhETF.49.23,
    title = {Study of the energy gap in thin films of a high-$T_c$ superconductor},
    author = {Abel', E. V. and Bagaev, V. S. and Basov, D. N. and Golovashkin, A. I. and Krasnosvobodtsev, S. I. and Pechen', E. V. and Plotnikov, A. F. and Poyarkov, A. G.},
    journal = {πΙΣΨΝΑ Χ φότζ},
    volume = {49},
    issue = {1},
    pages = {23},
    year = {1989},
    doi = {},
    url = {http://jetpletters.ru/ps/0/article_16821.shtml},
}